Proposal of X-ray absorption spectroscopy and magnetic circular dichroism using broadband free-electron lasers
文献类型：期刊论文
| 作者 | Deng, BJ; Yan, JW; Zhang, QM; Sang, YD; Deng, HX |
| 刊名 | JOURNAL OF SYNCHROTRON RADIATION
 |
| 出版日期 | 2019 |
| 卷号 | 26期号:-页码:1—10 |
| 关键词 | BANDWIDTH ANISOTROPIES GRADIENT REGIME PULSES |
| ISSN号 | 1600-5775 |
| DOI | 10.1107/S1600577518015175 |
| 文献子类 | 期刊论文 |
| 英文摘要 | X-ray free-electron lasers (XFELs) have been widely used for applications such as X-ray crystallography and magnetic spin probes because of their unprecedented performance. Recently, time-resolved X-ray magnetic circular dichroism (XMCD) with ultrafast XFEL pulses have made it possible to achieve an instantaneous view of atomic de-excitation. However, owing to the narrow bandwidth and coherence of XFELs, X-ray absorption spectroscopy (XAS) and XMCD are time- and effort-consuming for both machine scientists and users of XFELs. In this work, an efficient scheme using a broadband XFEL pulse and single-shot X-ray spectrometer is proposed, in which the XAS and XMCD measurements can be accomplished with the same machine conditions. An evolutionary multi-objective optimization algorithm is used to maximize the XFEL bandwidth offered by the Shanghai Soft X-ray FEL user facility without additional hardware. A numerical example using MnO is demonstrated, showing that, by using approximately 1000 consecutive XFEL shots with a central photon energy of 650eV and full bandwidth of 4.4%, precise spectral measurements for XAS and XMCD can be achieved. Additional considerations related to single-shot XAS and XMCD are discussed. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31779]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Xi An Jiao Tong Univ, Sch Nucl Sci & Technol, Xian 710049, Shaanxi, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Deng, BJ,Yan, JW,Zhang, QM,et al. Proposal of X-ray absorption spectroscopy and magnetic circular dichroism using broadband free-electron lasers[J]. JOURNAL OF SYNCHROTRON RADIATION,2019,26(-):1—10. |
| APA | Deng, BJ,Yan, JW,Zhang, QM,Sang, YD,&Deng, HX.(2019).Proposal of X-ray absorption spectroscopy and magnetic circular dichroism using broadband free-electron lasers.JOURNAL OF SYNCHROTRON RADIATION,26(-),1—10. |
| MLA | Deng, BJ,et al."Proposal of X-ray absorption spectroscopy and magnetic circular dichroism using broadband free-electron lasers".JOURNAL OF SYNCHROTRON RADIATION 26.-(2019):1—10. |
入库方式： OAI收割
来源：上海应用物理研究所
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